<a href=https://github.com/protocolbuffers/protobuf/issues/new class=td-page-meta--project-issue target=_blank rel=noopener><i class="fa-solid fa-list-check fa-fw"></i> Create project issue</a></div><div class=td-toc><nav id=TableOfContents><ul><li><a href=#c-breaking-changes>C++ Breaking Changes</a><ul><li><a href=#remove-deprecated-clear-apis-on-repeated-fields>Remove deprecated clear APIs on repeated fields</a></li><li><a href=#remove-c-legacy-syntax-descriptor-apis>Remove C++ legacy syntax descriptor APIs</a></li><li><a href=#remove-deprecated-syntax-accessor>Remove deprecated syntax accessor</a></li><li><a href=#remove-deprecated-supportsunknownenumvalues-method>Remove deprecated SupportsUnknownEnumValues method</a></li><li><a href=#remove-stdstring-error-collector-overrides>Remove std::string error collector overrides</a></li></ul></li><li><a href=#python-breaking-changes>Python Breaking Changes</a><ul><li><a href=#timestamps-are-checked-for-validity>Timestamps are checked for validity</a></li><li><a href=#remove-deprecated-syntax-accessor-1>Remove deprecated syntax accessor</a></li><li><a href=#unknownfields-support-removal>UnknownFields support removal</a></li></ul></li></ul></nav></div></aside><main class="col-12 col-md-9 col-xl-8 pl-md-5" role=main><nav aria-label=breadcrumb class=td-breadcrumbs><ol class=breadcrumb><li class=breadcrumb-item><a href=https://protobuf.dev/news/>News</a></li><li class="breadcrumb-item active" aria-current=page><a href=https://protobuf.dev/news/2023-12-13/ aria-disabled=true class="btn-link disabled">December 13, 2023</a></li></ol></nav><div class=td-content><h1>Changes announced on December 13, 2023</h1><div class=lead>Changes announced for Protocol Buffers on December 13, 2023.</div><header class=article-meta></header><h2 id=c-breaking-changes>C++ Breaking Changes</h2><p>In v26, we are planning a major version bump for C++ as per our
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